Muscle Quiz

1. When you stand on one leg, which muscle is especially important for helping keep the pelvis level on the unsupported side?

2. What is the smallest repeating contractile unit within a myofibril?

3. Which neurotransmitter is released by a motor neuron at a typical skeletal neuromuscular junction?

4. Which type of muscle tissue moves material through the walls of the intestines?

5. During a standing heel raise, which pair supplies most of the force for plantar flexion at the ankle?

6. Which muscle is most directly responsible for flexing the trunk during a controlled abdominal curl-up?

7. You lift the front of your foot so your toes move toward your shin. Which muscle is a primary producer of this dorsiflexion?

8. Which muscle tissue is normally striated and under voluntary control?

9. Which structure typically connects a muscle to a bone?

10. A runner strains a muscle group along the back of the thigh. Which group is most likely involved?

11. While lifting a dumbbell, the biceps shortens as the elbow bends. What type of contraction is occurring in the biceps?

12. Which muscle contracts and flattens to increase the chest cavity’s volume during quiet inhalation?

13. As you rise from a seated position, which muscle group produces much of the knee extension?

14. When you straighten your elbow against resistance, which muscle is the principal antagonist to the elbow-flexing action of the biceps brachii?

15. In anatomical muscle names, what does the term “maximus” usually indicate?

16. Which term traditionally describes a muscle attachment that is relatively fixed during a particular movement?